I clean my arrestors a couple of times/yr and haven't had any problems. There is a hose clamp that must be loosened and I also take off the plastic engine cover. Then grab the arrestor and wiggle it side to side and it should come off the intake manifold. My engines have no iac mufflers. Sure they can whistle somewhere around 1500 RPM, but the iac is at the opposite end of the engine so I'm not too worried about it getting dirty or clogged. Never had any issues with the non-muffled iac (so far).
Posted by Jim of "Island Rhythm"
2001 Sea Ray 340 Amberjack
LOA 38', approx 18,000 lbs & 13.5' Beam
Straight Shaft Drives